Why is it not used again and wouldn’t it be very efficient to combine with a heat pump for reuse?
Especially since water from shower or sink isn’t usually very dirty, couldn’t it be stored for a while in an isolated tank so that e.g. a heat pump can run more efficient on it than on usually colder air or colder ground water?
In: Engineering
In our municipality of 300 000 people the sewage goes to treatment plant. From there it goes to heatpumps of district heating company. After that it goes to the ocean. They say the input and output temperature difference is about 5 celcius. Its enough to heat about 15000 households.
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